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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 46, Iss. 13 — May. 1, 2007
  • pp: 2460–2470

Parameterization of aerosol and cirrus cloud effects on reflected sunlight spectra measured from space: application of the equivalence theorem

Andrey Bril, Sergey Oshchepkov, Tatsuya Yokota, and Gen Inoue  »View Author Affiliations

Applied Optics, Vol. 46, Issue 13, pp. 2460-2470 (2007)

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An original methodology to account for aerosol and cirrus cloud contributions to reflected sunlight is described. This method can be applied to the problem of retrieving greenhouse gases from satellite-observed data and is based on the equivalence theorem with further parameterization of the photon path-length probability density function (PPDF). Monte Carlo simulation was used to validate this parameterization for a vertically nonhomogeneous atmosphere including an aerosol layer and cirrus clouds. Initial approximation suggests that the PPDF depends on four parameters that can be interpreted as the effective cloud height, cloud relative reflectance, and two additional factors to account for photon path-length distribution under the cloud. We demonstrate that these parameters can be efficiently retrieved from the nadir radiance measured in the oxygen A-band and from the H 2 O -saturated area of the C O 2 2.0 μ m spectral band.

© 2007 Optical Society of America

OCIS Codes
(010.1280) Atmospheric and oceanic optics : Atmospheric composition
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(290.1090) Scattering : Aerosol and cloud effects

ToC Category:
Atmospheric and ocean optics

Original Manuscript: October 3, 2006
Revised Manuscript: December 28, 2006
Manuscript Accepted: December 29, 2006
Published: April 9, 2007

Andrey Bril, Sergey Oshchepkov, Tatsuya Yokota, and Gen Inoue, "Parameterization of aerosol and cirrus cloud effects on reflected sunlight spectra measured from space: application of the equivalence theorem," Appl. Opt. 46, 2460-2470 (2007)

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